// Define a class with a single string member called "name"classFruit;stringname;functionnew(stringname="Unkown");this.name= name;endfunctionendclassmoduletb;// Create a queue that can hold values of data type "Fruit"Fruit list [$];initialbegin// Create a new class object and call it ...
对线网的声明进行简化,即:net_type+list_of_net_identifiers,其中net_type包含我们常用的如wire、tri、wand、wor等等(参考完整的线网声明:net_declaration); 对变量的声明进行简化,即:reg | integer | time | real | realtime+list_of_variable_identifiers(参考完整的变量声明:variable_declaration)。 可以看到,...
使用允许的Verilog数据类型(data types)声明其他信号 设计可能依赖于其他Verilog模块,因此其实例由模块实例化(module instantiations)创建 描述其行为的该模块的实际Verilog设计 module[design_name]([port_list]);[listofinputports];[listofoutputports];[declarationofothersignals];[othermoduleinstantiationifrequired];[...
always@(<edge_type> clk) // only clk in the sensitive list begin ; end 参考例子如下: // a must be register data types always@(posedge clk) begin a <= b; end 具有同步复位的always 具有同步复位的always的语法如下: always@(<edge_type> clk) begin if(rst) //or if(!rst) begin ; en...
Verilog has undergone a few revisions and the original IEEE version in 1995 had the following way for port declaration. Here, module declaration had to first list the names of ports within the brackets and then direction of those ports defined later within the body of the module. ...
always@(<sensitive_list>)begin ; end 参考例子如下: // b must be register data types always@(a)begin b = not a; end 上述例子描述了一个非门的结构,关于纯组合always程序块,有三点需要注意: 一、纯组合always程序块中的语句强烈推荐只使用阻塞赋值符号,而时序always程序块中推荐只使用非阻塞赋值符号,...
(2) Port list Port 提供了与外界交互的接口,就提供了很大灵活性给开发者。 根据方向,有Input output inout 规则是:(reg or net)internal unit and external unit(net) (3) Port declarations (4) Parameters (5) Declarations of Wire and regs or variables (6) Instantiation of lower level module (7...
always@(<sensitive_list>)begin ; end 参考例子如下: // b must be register data types always@(a)begin b = not a; end 上述例子描述了一个非门的结构,关于纯组合always程序块,有三点需要注意: 一、纯组合always程序块中的语句强烈推荐只使用阻塞赋值符号,而时序always程序块中推荐只使用非阻塞赋值符号,...
dpi_task_import_property ::= context dpi_function_proto ::= function_prototype dpi_task_proto ::= task_prototype function_prototype ::= function data_type_or_void function_identifier [ ( [ tf_port_list ] ) ] task_prototype ::= task task_identifier [ ( [ tf_port_list ] ) ] // ...
: data_type list_of_variable_decl_assignments SEMI ;lifetime : "static" | "automatic" ;//A.2.2 Declaration data types //A.2.2.1 Net and variable types casting_type : simple_type | number //| size | signing ;data_type : integer_vector_type ( signing )? ( packed_dimension )*...